US2394760A - Slag cleaning tool - Google Patents

Description

Patented Feb. 12, 19%

UNITED STATES PATENT OFFICE SLAG CLEANING TOOL Ora E. Felton, Gary, Ind.

. Application March 1, 1944, Serial No. 524,639

' 3 Claims. (Cl. 15- 4) This invention relates to a slag cleaning tool for removing slag from slab heating furnaces and the like. These furnaces are of the continuous type and the slabs are pushed through the furnace on skids and the slag often accumulates on the hearth tosuch an extent that it is very dinlcult to push the slabs along the skids. When this occurs, it is necessary to remove the slag without shutting down the furnace Slag is also remove'd during shut down periods.

It is an object of this invention to provide a slag cleaning tool which may be used .to remove slag from a furnace which may be hot or cold.

This and other objects will be more apparent after referring to the following specification and attached drawing in which:

Figure 1 is a cross sectional view showing tool in operation; and

Figure 2 is an enlarged front view of the tool.

Referring more particularly to the drawing, the

the

' reference numeral 2 indicates the hearth of a furnace having a layer of slag l thereon which is to be removed. The tool consists of a Stellite" steel skid 6 having a flat bottom 8 and a wedge shaped leading edge l0. Welded to the skid is a relatively long pipe l2 which is reduced at its forward edge to form a nozzle l4. The rear end of th pipe is sealed by means of the plate I6. Ad-

-jacent the rear end of the pipe is an opening l8 through which passes a bent pipe 20, the forward end of which is bent to correspond to the shape of the nozzle 14. The pipe 20 is welded to the pipel2 where it passes through the opening l8. Adjacent the opening I8 is a second opening 22 for receiving a short tube 24 which is welded to pipe l2 as shown.

When it is desired to remove slag'from the furnace hearth when the furnace is hot, sufficient slabs are peeled off from the furnace hearth to give the workmen sufficient space and time to remove the slag. An air hose being connected to the pipe 20 and a water hose to the pipe 24, the

front end of the tool is inserted into the furnace throughone of the side doors and the skid B is positioned against the accumulated slag 4. at a point directly between the hearth and the slag as shown in Figure 1. The water fills the pipe l2 and is delivered from the forward end of the pipe through the small opening 26 and as it emerges through this opening, it is sprayed forward by air from the pipe 20. The tool is pressed forward by the operator who grasps the rear end of pipe I2 so that its leading edge Ill will pry up the slag slightly creating a small opening into which a portion of the sprayed water will enter. As a During weekends, when the furnace is shut down and cold, slag is also removed, the operation being similar to that described above, but no water is supplied to the pipe l2 since the slag'is in a cold state and the water would not be converted into steam. The air delivered through th pipe 20 removes loose or granulated slag in front of the leading edge Hi, this enabling the tool to operate with maximum efficiency since the loose slag would form a cushion or buffer which would prevent the eifective entrance of the leading edge H) between the hearth and the slag.

While one embodiment of the invention has been shown and described, it will be apparent that other adaptations and modifications may bemade without departing from the scope of the following claims.

I claim: g

1. A cleaning tool for removing hot slag which comprises a relatively thin elongated skid having a relatively flat bottom and a wedge shaped leading edge sloping downwardly toward said bottom for prying up said slag, a tube fastened to the top of the rear end of said skid, means for delivering water to said tube, said tube having an outlet for said water at its forward end, and means for discharging air adjacent said water outlet to spray the water forward over the skid and under the pried up slag, said water turning into steam upon contacting the hot slag whereby the slag is broken up into small particles.

2. A cleaning tool for removing hot slag which comprises a relatively thin elongated skid having a relatively flat bottom and a wedge shaped leading edge sloping downwardly toward said bottom for prying up said slag, a tube fastened to the top of the rear end of said skid, means for delivering water to said tube, said tube having an outlet for said water at its forward end, a second tube within said first tube, means for delivering air to said second tube, and means for discharging air adjacent said water outlet to spray the water forward over the skid and under the pried up slag, said water turning into steam upon contacting the hot slag whereby the slag is broken up into small particles.

3. A cleaning tool for removing hot slag which comprises a relatively thin elongated skid having a relatively flat bottom and a wedge shaped leading edge sloping downwardly toward said bottom for prying up said slag, a tube fastened to the top of therear end of said skid, means for delivering water to said tube, said tube having an outlet for said water at its forward end. a second tube within said first tube, means for delivering air to said,

second tube, said second tube having an outlet above the water outlet for discharging air therefrom to spray the water forward over the skidand under the pried up slag, said water turning into steam upon contacting the hot slag whereby the slag is broken up into small particles.

ORA. E. FELTON.

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